What if the underlying mechanism causing Alzheimer's is responsible for the deterioration in sleep quality in the first place? If you put it simply like "bad sleep causes Alzheimer's" you make almost exactly the same mistake as the researchers who came up with Beta-Amyloid thesis: there are plaques, they must be responsible for destroying the cells. But as time has shown, the real causality is much more complex.
I agree that all directions should be explored. I wonder if there's already a database of Alzheimer patients that includes sleep quality measurements?
I agree that fixing sleep quality is not simple and that getting to the root causes of lack of sleep quality for a specific individual is the optimal means to pursue this. (I am certainly not interested in, say, promoting sleeping pills as an answer.)
I agree that all directions should be explored. I wonder if there's already a database of Alzheimer patients that includes sleep quality measurements?